Process for forming yarn of improved properties

ABSTRACT

In a process for forming yarn wherein a plurality of yarn ends pass from their respective yarn packages, are each wrapped about a common feed roll, pass from the feed roll through a heating zone, pass from the heating zone to a common heated draw roll, are wrapped about the heated draw roll, and pass from the heated draw roll through apparatus for bringing the yarn ends into contact with one another in a preselected arrangement to form a resultant yarn, said resultant yarn is caused to have improved properties by wrapping a selected one of the yarn ends about the heated draw roll a number of turns, said number of turns being greater than the common number of turns the other yarn ends are wrapped about said draw roll.

Kimbrell United States Patent PROCESS FOR FORMING YARN OF IMPROVED PROPERTIES Assignee:

Filed:

Inventor: William C. Kimbrell, Blacksburg,

Phillips Petroleum Company,

Bartlesville, Okla.

Aug. 23, 1972 Appl. No.: 282,934

US. Cl. 57/157 TS, 28/72 R, 264/290 R Int. Cl. D02j 1/22 Field of Search 57/55.5, 157 R, 157 S;

28/7l.7, 72 R; 264/290 R, 290 N, 290 T 1 References Cited UNITED STATES PATENTS 3,344,597 10/1967 Petl'ee 57/157 R Primary Examiner-John Petrakes AttorneyPau1 L. Gomory et a1.

[5 7 1 ABSTRACT In a process for forming yarn wherein a plurality of yarn ends pass from' their respective yarn packages, are each wrapped about a common feed roll, pass from the feed roll through a heating zone, pass from the heating zone to a common heated draw roll, are wrapped about the heated draw roll, and pass from the heated draw roll through apparatus for bringing the yarn ends into contact with one another in a preselected arrangement to form a resultant yarn, said resultant yarn is caused to have improved properties by wrapping a selected one of the yarn ends about the heated draw roll a number of turns, said number of turns being greater than the common number of turns the other yarn ends are wrapped about said draw roll.

3 Claims, 1 Drawing Figure PROCESS FOR FORMING YARN OF IMPROVED PROPERTIES lt is desirable to provide a process for forming a yarn having improved properties. More particularly, it is desirable to provide a process for forming a yarn which has improved color characteristics when formed into carpet. Further, it is desirable to provide a process for forming a yarn from a plurality of yarn ends whereby selected yarn ends form the core of a resultant yarn of the process.

This invention therefore resides in a process for forming yarn wherein a plurality of yarn ends pass from their respective yarn packages, are each wrapped about a common feed roll, pass from the feed roll through a heating zone, pass from the heating zone to a common heated draw roll, are wrapped about the heated draw roll, and pass from the heated draw roll through apparatus for bringing the yarn ends into contact with one another in a preselected arrangement to form a resultant yarn which has improved properties caused by wrapping a selected one of the yarn ends about the heated draw roll a number of turns, said number of turns being greater than thecommon number of turns the other yarn ends are wrapped about said draw roll.

Other aspects, objects, and advantages of the present invention will become apparent from a study of the disclosure, the appended claims, and the drawing.

The drawing is an example diagrammatic view of the process of this invention.

Referring to the drawing, a plurality of yarn ends 2, 4, 6 for example pass from their respective yarn packages 8, l0, 12, are each wrapped about a common feed roll 14, here shown as a single roll for example, pass from a feed roll 14 through a heating zone 16, here shown as a plate heater, pass from the heating zone 16 to a common heated draw roll 18, here shown as a single draw roll, are wrapped about the heated draw roll 18, pass from the heated draw roll 18 through means 20 for bringing the yarn ends 2, 4, 6 into contact one with the other in a preselected arrangement for forming a resultant yarn, here shown as a ring flyer 22 and takeup package 24 arrangement as is known in the art.

In the improved process of this invention, a selected one of the yarn ends, here yarn end 6, is wrapped about the heated draw roll 18a number of turns with said number of turns being greater than the common number of turns the other yarn ends 2, 4 for example are wrapped about said draw roll 18.

It has surprisingly been found that by wrapping the yarn end 6 additional turns about the draw roll 18, said esters such as polyethylene terephthalate, and acrylic fibers as are known in the art.

EXAMPLE I Using an apparatus similar to the apparatus illustrated in the drawings, three yarn ends (two black and one white) of undrawn polypropylene each yarn having an undrawn denier of 2,380 were drawn with each yarn having three wraps around the outfeed draw roll and then plied. The resultant yarn had a final denier of 2,125 and was non-uniform in color having a muted or marbled appearance.

EXAMPLE ll Using the same apparatus as in Example I, three substantially identical yarn ends were processed under the same conditions with the exception that the white yarn was given an additional or fourth wrap around the outfeed draw roll. The additional wrap caused the white yarn end 6 is caused to have propertieswhich result in yarn to spiral around the black in a uniform manner. The resultant yarn exhibited distinct black and white portions of uniform color.

Other modifications and alterations of this invention will become apparent to those skilled in the art from the foregoing discussion and accompanying drawing, and it should be understood that this invention is not to be unduly limited thereto.

What is claimed is: I

1. ln a process for forming yarn wherein a plurality of yarn ends pass from their respective yarn packages, are each wrapped about a common feed roll, pass from the feed roll through a heating zone, pass from the heating zone to a common heated draw roll, are wrapped about the heated draw roll, and pass from the heated draw roll through apparatus for bringing the yarn ends into contactwith one another in a preselected arrangement to form a resultant yarn, the improvement comprising:

wrapping a selected one of the yarn ends about the heated draw roll a number of turns, said number of turns being greater than the common number of turns the other yarn ends are wrapped about said draw roll.

2. A method, as set forth in claim I, wherein the selected yarn end is wrapped about the draw roll one turn greater than the number of turns each of the other yarn ends are wrapped about said draw roll.

3. A method, as set forth in claim 1, wherein the selected yarn end is wrapped four turns about the draw roll and the other yarn ends are each wrapped three turns about the draw roll. 

1. In a process for forming yarn wherein a plurality of yarn ends pass from their respective yarn packages, are each wrapped about a common feed roll, pass from the feed roll through a heating zone, pass from the heating zone to a common heated draw roll, are wrapped about the heated draw roll, and pass from the heated draw roll through apparatus for bringing the yarn ends into contact with one another in a preselected arrangement to form a resultant yarn, the improvement comprising: wrapping a selected one of the yarn ends about the heated draw roll a number of turns, said number of turns being greater than the common number of turns the other yarn ends are wrapped about said draw roll.
 2. A method, as set forth in claim 1, wherein the selected yarn end is wrapped about the draw roll one turn greater than the number of turns each of the other yarn ends are wrapped about said draw roll.
 3. A method, as set forth in claim 1, wherein the selected yarn end is wrapped four turns about the draw roll and the other yarn ends are each wrapped three turns about the draw roll. 